DADOS Slit-Spectrograph

So far, we do not have plans for additional filter sizes. These narrow-band-filters work best visual or with monochrome cameras, anyway, because on a colour camera, all the red and blue pixels would be useless.
But you can use Baader DSLR-2" Filter Holder M48/SP54 # 2408166 plus the Hyperion DT and stepper rings to install the 2" filter in front of most camera lenses which have a filter thread. This will cause some vignetting of the aperture, but it shouldn't be much of a problem asthe sun is still small enough with most camera lenses.

Yes, absolutely. A highly recommended filter, even for a triplet.The contrast of the sun's surface increases significantly. Fine structures at the edges of sunsports, the granualation and flare areas appear more clearly. Much better than classic green- or yellow filters.

You need exactly three products. The Baader Ultrashort 2" eyepiece clamp (productno.: 2458196), the Baader Takahashi Mewlon Aux-Adapter M71/M72 (productno.: 2558231) and the Baader Takahashi Adapter M72/M68 (productno.: 2558230).

Yes, this works for the new version of the Herschel (Baader 2" Cool-Ceramic Safety Herschel Prism Mark II). Older models without the integrated rotating mechanism for the polarizing filter need the Baader Adapter 2" (male) / T-2 (male) # 1508035 instead.

Please note that the inner diameter of T-2-adapters is ca. 38mm, so there may be some vignetting with a full frame sensor. You will probably not notice it as the image of the sun ist still smaller. One meter of focal length results in a 1 cm large image of the sun, so you'd need about 4m of focal length to fill the frame.

If you want to be sure, you should use Diamond Steeltrack® S58 to M48 BDS-Adapter # 2957204, Reducing piece S52 / M48 # 2958552 and Baader Wide-T-Ring Nikon with D52i to T-2 and S52 # 2408333. This will avoid any vignetting, and you can use the T-ring with 2" / S52 Nosepiece # 2958551 on any 2" focuser, if you later want to use it e.g. for Deep Sky photography without the Herschel wedge.

Yes, this works for the new version of the Herschel (Baader 2" Cool-Ceramic Safety Herschel Prism Mark II). Older models without the integrated rotating mechanism for the polarizing filter need Baader Adapter 2" (male) / T-2 (male) # 1508035 instead.

Please note that the inner diameter of T-2-adapters is ca. 38mm, so there may be some vignetting with a full frame sensor. You will probably not notice it as the image of the sun ist still smaller. One meter of focal length results in a 1 cm large image of the sun, so you'd need about 4m of focal length to fill the frame.

If you want to be sure, you should use Diamond Steeltrack® S58 to M48 BDS-Adapter # 2957204 and Reducing piece S52 / M48 # 2958552 instead of the S58/T-2-adapter #2957202. This will avoid any vignetting, and you can use the T-ring with 2" / S52 Nosepiece # 2958551 on any 2" focuser, if you later want to use it e.g. for Deep Sky photography without the Herschel wedge.